Aery Aviation LLC [Wilmington, DE], is making a stop at HNL. With one of the port-side windows having a sensor sticking out from it, it appears to be a research jet. According to engelsjk.com, it flew circuits over Minnesota and Michigan.
14 Oct 21 UPDATE
N515JA has been flying circuits over the islands at FL410 as FST707.
22 Oct 21 UPDATE
This G-IV departed HNL this morning for VCV.